encoding  utf-8
survey Map

  input SouthPassage.th
  input SouthPassage_s1.th2
  input SouthPassage_s2.th2
  input SouthPassage_s3.th2
  join wall_SPS3S wall_SPS2
  join wall SPS3N wall_SPS2

  map SouthPassage_m1
	SouthPassage_s1
	SouthPassage_s3
	break
	SouthPassage_s2
  endmap
endsurvey